63745668 has 54 divisors (see below), whose sum is σ = 187447806. Its totient is φ = 18212544.

The previous prime is 63745667. The next prime is 63745681. The reversal of 63745668 is 86654736.

63745668 is a `hidden beast` number, since 637 + 4 + 5 + 6 + 6 + 8 = 666.

63745668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 56520324 + 7225344 = 7518^2 + 2688^2 .

It is not an unprimeable number, because it can be changed into a prime (63745663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16305 + ... + 19832.

Almost surely, 2^63745668 is an apocalyptic number.

It is an amenable number.

63745668 is an abundant number, since it is smaller than the sum of its proper divisors (123702138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63745668 is a wasteful number, since it uses less digits than its factorization.

63745668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36161 (or 36149 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 63745668 is about 7984.0884263640. The cubic root of 63745668 is about 399.4694382384.

The spelling of 63745668 in words is "sixty-three million, seven hundred forty-five thousand, six hundred sixty-eight".